Blue Sea 1016
Round socket mount · 5V, 2.1A total
Lower-output dual USB-A charger; tethered dust cap.
Identify Blue Sea Dual USB Chargers by Mount & Output
A black dual-USB charger may resemble another part, but Blue Sea 1016, 1039 and 1045 differ in mounting shape and output. Identifying the original number and the rear input-voltage marking is especially useful when replacing an older unit in an RV, boat or truck electrical panel.
Which opening does your charger use?
Round socket mount · 1016 / 1045
Both mount in a 1-1/8-inch round hole. The 1016 is a 2.1A-total charger while 1045 provides up to 4.8A total USB output.
Rectangular switch mount · 1039
The 1039 is designed for a Contura-style switch aperture (approximately 1.45 × 0.83 inches). It also provides up to 4.8A total USB output.
Identify the model from its dimensions and rating
| MPN | Mounting | Cutout | Maximum USB output | Input |
|---|---|---|---|---|
| 1016 | Round socket mount | 1-1/8 in diameter | 5V, 2.1A total | 12/24V DC on current version |
| 1039 | Contura switch mount | 1.45 in high × 0.83 in wide | 5V, 4.8A total | 12/24V DC |
| 1045 | Round socket mount | 1-1/8 in diameter | 5V, 4.8A total | 12/24V DC |
The current manufacturer data for 1016 lists a 9–32V input range, but earlier 1016 revisions were limited to 9–16V. Check the voltage marking on the specific unit before connecting it to a 24V system.
Inspect before using an existing charger
- Find the printed Blue Sea model number and input-voltage label. The older 1016 revision differs from the current published specification.
- Confirm whether the charger belongs in a round socket hole or a rectangular Contura-style panel opening. The mounts are not direct replacements.
- Examine both USB contacts, the dust cap, rear terminals and enclosure for corrosion, heat marks or damage.
- Verify the actual available voltage, supply polarity and protective fuse for the intended wiring circuit.
- Check the specific listing for included components, condition and availability. UsedRVParts viewing and pickup are by appointment in Kelowna.
These dual USB-A outlets deliver a nominal 5V USB supply. They should not be assumed to provide USB-C or USB Power Delivery fast charging. With the dust cap closed, Blue Sea's current models carry an IP45 rating.
Find the matching Blue Sea charger
Check the individual listing for condition, supplied hardware and the voltage marking on the actual charger.
Blue Sea 1039
Contura switch mount · 5V, 4.8A total
Switch-panel format with intelligent device recognition.
Blue Sea 1045
Round socket mount · 5V, 4.8A total
Round socket format with intelligent device recognition.
Related electrical installation references
For protected cable routing, compare our Blue Sea CableClam entry guide.
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